Question

A woman holds a tube of lipstick 7.7 cm from a spherical mirror and notices that the image of the tube is inverted and one eighth its normal size.

(a) Determine the position of the image. Is it in front of or behind the mirror? (Use a negative number below to indicate the image is behind the mirror.)
0.962 cm
I already solved A just need B
(b) Calculate the focal length of the mirror.
  
Your response differs from the correct answer by more than 10%. Double check your calculations. cm

Answer 1

Given:

Object distance,

Given that the image of the tube is inverted and one eighth its normal size.

Since the image is inverted, put a negative sign for magnification

So magnification,

Magnification,

(a) ANSWER:

Image distance is positive, so the image is infront of the mirror.

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(b) Calculate the focal length of the mirror.
Use formula

(b) ANSWER:

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